The technology potentially could open up several opportunities to share data in a “secret” way by keeping it encrypted, with the express purpose of gleaning some sort of insight from the data, Mr. Smessaert said. For example, it could allow companies in other countries, such as Switzerland and Luxembourg, which have laws that prohibit the transfer of customer data outside the country, to share encrypted data.

https://blogs.wsj.com/cio/2017/06/01/ing-belgium-sees-opportunities-for-secret-sharing-of-encrypted-data/